EP0251368A2 - Fluid filtration device - Google Patents

Fluid filtration device Download PDF

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Publication number
EP0251368A2
EP0251368A2 EP87201069A EP87201069A EP0251368A2 EP 0251368 A2 EP0251368 A2 EP 0251368A2 EP 87201069 A EP87201069 A EP 87201069A EP 87201069 A EP87201069 A EP 87201069A EP 0251368 A2 EP0251368 A2 EP 0251368A2
Authority
EP
European Patent Office
Prior art keywords
filtering surface
fluid
rotation
filtering
space portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87201069A
Other languages
German (de)
French (fr)
Other versions
EP0251368B1 (en
EP0251368A3 (en
Inventor
Gilberto Fava
Giorgio Girondi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universal Filter Italiana SpA
Original Assignee
Universal Filter Italiana SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Universal Filter Italiana SpA filed Critical Universal Filter Italiana SpA
Priority to AT87201069T priority Critical patent/ATE67011T1/en
Publication of EP0251368A2 publication Critical patent/EP0251368A2/en
Publication of EP0251368A3 publication Critical patent/EP0251368A3/en
Application granted granted Critical
Publication of EP0251368B1 publication Critical patent/EP0251368B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/70—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D29/74—Regenerating the filter material in the filter by forces created by movement of the filter element involving centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/52—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D33/56—Regenerating the filter material in the filter by forces created by movement of the filter element involving centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/72—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
    • B01D33/725—Special treatment of the feed stream before contacting the filtering element, e.g. cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/80—Accessories
    • B01D33/801—Driving means, shaft packing systems or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/28—Position of the filtering element
    • B01D2201/287—Filtering elements with a vertical or inclined rotation or symmetry axis

Definitions

  • This invention relates to a fluid filtration device.
  • the main object of the present invention is to provide a fluid filtration device which allows easy declogging of the filter whenever this is considered necessary.
  • a subsidiary object of the invention is to provide a device which is of considerable simplicity so as to ensure low cost and maximum operational reliability.
  • the fluid filtration device which comprises a filtering surface, and a casing enclosing the filtering surface and comprising an inlet port for the fluid to be filtered and an outlet port for the filtered fluid, characterised by comprising an element connected to drive means arranged to rotate it about a shaft comprising an inner axial duct communicating with said outlet port, and through bores arranged to put an outer surface of the element into communication with the inner duct; said casing defining in its interior a space portion which surrounds the filtering surface and communicates with said inlet port.
  • the reference numeral 1 indicates a concertina-folded filtering surface disposed adhering to the outer surface 31 of an element 2 which can be rotated by drive means, not shown on the figure, and consisting for example of a lower motor connected into the electrical circuit of an automobile, and provided with controls for its operation by an operator.
  • Said element 2 comprises an inner axial duct 3 and a plurality of regularly distributed radial through bores 5 which allow the inner duct 3 to communicate with the outer surface 31 embraced by the filtering surface 1.
  • the outer surface 31 is of cylindrical shape.
  • the filtering surface 1 is also of overall cylindrical shape and is superposed on the surface 31 so that it covers this latter.
  • the filtering surface 1 is rigidly joined to the element 2 by rings 7, 8 pressed by ring nuts 9, 10 associated with the element 2 by means of a thread.
  • Blades 11 extending axially to a limited extent project from a base which is rigid with that end of the element 2 to be disposed lowerly during operation, their purpose being to crush any falling paraffin granules.
  • the device casing 30 comprises two flanges 12 and 13 assembled by tie bolts 16 and provided with supports 33 and 34 for the element 2 and seal gaskets 14 and 15.
  • Said flanges 12 and 13 are connected together by a wall 18 which defines a space portion 32 surrounding the filtering surface 1 and into which there open a port 12a provided in the upper flange 12 for entry of the fluid to be filtered, and a discharge hole 13a provided in the lower flange 13 for the material retained by the filtering surface 1.
  • a port 12b for exit of the filtered fluid from the device is positioned in the flange 12 in correspondence with the opening of the inner duct 3 of the element 2.
  • the space portion 32 defines a lower region 32a between the lower end of the filtering surface 1 and the lower flange 13, to receive material which has been retained by the filtering surface 1 and then separated therefrom by the rotation of the element 2.
  • the invention in the form of the described embodiment obviates all difficulties relating to the starting of automobile diesel engines in a cold climate.
  • the filter is freed of all clogging and the engine can then be started, as the diesel oil feed can circulate perfectly along the path indicated by the arrows in Figure 1, by entering the device through the port 12a, then passing through the filtering surface 1 from the space portion 32 defined about it by the wall 18, then passing through the radial through bores 5, and finally entering the inner duct 3 and leaving through the port 12b.
  • the blades 11 crush any paraffin granules into small particles in order to facilitate their liquefaction and their passage through the filtering surface 1.
  • the device operates analogously when used as a combustion air filter for internal combustion engines.
  • the user rotates the filter support element at regular intervals so as to keep it clean, resulting in long life and high efficiency with the consequent possibility of reducing its dimensions.
  • the blades 11 are not present.
  • the material which is retained by the filtering surface 1 and then separated therefrom by rotation of the element 2 deposits in the lower region 32a, and can be evacuated from this through the hole 13a (which is normally closed).
  • the drive means for rotating the filter support element can be of any type.
  • said drive means can be controlled automatically, and if the device is used for filtering the combustion air of internal combustion engines this control can be effected by a signal from the intake manifold proportional to the vacuum in the manifold, which depends on the degree of clogging of the filter.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtration Of Liquid (AREA)

Abstract

The invention relates to a fluid filtration device which allows easy filter declogging whenever considered necessary. The invention consists of a device comprising a filtering surface (1) contained in a casing (30) in which the filtering surface (1) adheres to the outer surface (31) of an element (2) which is able to be rotated and is provided with a central duct (3) opening in correspondence with the filtered fluid outlet port (12b) and with through bores (5) which put the outer surface (31) embraced by the filtering surface (1) into communication with the central duct (3), the casing (30) defining a space portion (32) about the filtering surface (1) for entry of the fluid to be filtered and cleaned.

Description

  • This invention relates to a fluid filtration device.
  • In fluid, liquid or aeriform conveying circuits connected to machines in general, it is known to provide filtering surfaces which are traversed by said fluids in order to retain impurities in the form of solid particles contained in suspension or the like. This is so for example in the case of filters for the diesel oil feed to automobile diesel engines, or of combustion air filters for internal combustion engines.
  • In the operation of said filters, a difficulty is encountered in that they tend to clog, so preventing passage of the diesel oil or fluid in general, with consequent stoppage of operation of the machine to which the fluid circuit is connected, this clogging deriving from various causes but always related to the deposition of solid substances on the filtering surface.
  • In the case of filters for the diesel oil feed to automobile diesel engines, for example, it happens that during vehicle stoppages in cold periods the diesel oil falls to such a temperature that paraffin separates and deposits on the filtering surface to clog it, so that it becomes impossible to start the engine, as the diesel oil is unable to pass through the filtering surface.
  • In the case of combustion air filters for internal combustion engines, clogging occurs by the deposition of solid particles contained in the air, and this clogging is progressive because the gradually deposited particles are not removed, a degree of deposition finally being reached such as to require the filter to be removed and replaced with a new one.
  • The main object of the present invention is to provide a fluid filtration device which allows easy declogging of the filter whenever this is considered necessary.
  • A subsidiary object of the invention is to provide a device which is of considerable simplicity so as to ensure low cost and maximum operational reliability.
  • Said objects are attained by the fluid filtration device according to the invention, which comprises a filtering surface, and a casing enclosing the filtering surface and comprising an inlet port for the fluid to be filtered and an outlet port for the filtered fluid, characterised by comprising an element connected to drive means arranged to rotate it about a shaft comprising an inner axial duct communicating with said outlet port, and through bores arranged to put an outer surface of the element into communication with the inner duct; said casing defining in its interior a space portion which surrounds the filtering surface and communicates with said inlet port.
  • Further characteristics and advantages will be more apparent from the description of a preferred but not exclusive embodiment of the invention illustrated by way of non-limiting example on the accompanying drawings in which:
    • Figure 1 is a side view of the device, shown half in section on an axial plane;
    • Figure 2 is a partial section on the plane II-II of Figure 1.
  • In said figures, which relate to a filtration device for the diesel oil feed to automobile diesel engines, the reference numeral 1 indicates a concertina-folded filtering surface disposed adhering to the outer surface 31 of an element 2 which can be rotated by drive means, not shown on the figure, and consisting for example of a lower motor connected into the electrical circuit of an automobile, and provided with controls for its operation by an operator.
  • Said element 2 comprises an inner axial duct 3 and a plurality of regularly distributed radial through bores 5 which allow the inner duct 3 to communicate with the outer surface 31 embraced by the filtering surface 1.
  • The outer surface 31 is of cylindrical shape. The filtering surface 1 is also of overall cylindrical shape and is superposed on the surface 31 so that it covers this latter. The filtering surface 1 is rigidly joined to the element 2 by rings 7, 8 pressed by ring nuts 9, 10 associated with the element 2 by means of a thread. Blades 11 extending axially to a limited extent project from a base which is rigid with that end of the element 2 to be disposed lowerly during operation, their purpose being to crush any falling paraffin granules.
  • The device casing 30 comprises two flanges 12 and 13 assembled by tie bolts 16 and provided with supports 33 and 34 for the element 2 and seal gaskets 14 and 15.
  • Said flanges 12 and 13 are connected together by a wall 18 which defines a space portion 32 surrounding the filtering surface 1 and into which there open a port 12a provided in the upper flange 12 for entry of the fluid to be filtered, and a discharge hole 13a provided in the lower flange 13 for the material retained by the filtering surface 1. A port 12b for exit of the filtered fluid from the device is positioned in the flange 12 in correspondence with the opening of the inner duct 3 of the element 2. The space portion 32 defines a lower region 32a between the lower end of the filtering surface 1 and the lower flange 13, to receive material which has been retained by the filtering surface 1 and then separated therefrom by the rotation of the element 2.
  • The invention in the form of the described embodiment obviates all difficulties relating to the starting of automobile diesel engines in a cold climate. In this respect, before starting the engine it is necessary only to operate the motor for a short time period in order to rotate the element 2 and separate by centrifugal force the paraffin deposited on the filtering surface 1. In this manner, the filter is freed of all clogging and the engine can then be started, as the diesel oil feed can circulate perfectly along the path indicated by the arrows in Figure 1, by entering the device through the port 12a, then passing through the filtering surface 1 from the space portion 32 defined about it by the wall 18, then passing through the radial through bores 5, and finally entering the inner duct 3 and leaving through the port 12b.
  • During rotation of the element 2, the blades 11 crush any paraffin granules into small particles in order to facilitate their liquefaction and their passage through the filtering surface 1.
  • The device operates analogously when used as a combustion air filter for internal combustion engines. In this case, the user rotates the filter support element at regular intervals so as to keep it clean, resulting in long life and high efficiency with the consequent possibility of reducing its dimensions. In this case, the blades 11 are not present. The material which is retained by the filtering surface 1 and then separated therefrom by rotation of the element 2 deposits in the lower region 32a, and can be evacuated from this through the hole 13a (which is normally closed).
  • The described device can undergo numerous modifications, all of which fall within the scope of the inventive concept. For example, the drive means for rotating the filter support element can be of any type. In addition, said drive means can be controlled automatically, and if the device is used for filtering the combustion air of internal combustion engines this control can be effected by a signal from the intake manifold proportional to the vacuum in the manifold, which depends on the degree of clogging of the filter.

Claims (9)

1. A fluid filtration device comprising a filtering surface (1) and a casing (30) which encloses the filtering surface (1) and comprising an inlet port (12a) for the fluid to be filtered and an outlet port (12b) for the filtered fluid, characterised by comprising an element (2) connected to drive means arranged to rotate it about a shaft comprising an inner axial duct (3) communicating with said outlet port (12b), and through bores (5) arranged to put an outer surface (31) of the element (2) into communication with the inner duct (3); said filtering surface (1) being disposed to cover said outer surface (31) and being rigid therewith, said casing (30) defining in its interior a space portion (32) which surrounds the filtering surface (1) and communicates with said inlet port (12a).
2. A device as claimed in claim 1, characterised in that said space portion (32) comprises a discharge hole (13a) for the material retained by the filtering surface (1).
3. A device as claimed in claim 1, characterised in that said space portion (32) defines a lower region (32a) arranged to receive material which has been retained by the filtering surface (1) and then separated therefrom by rotation of the element (2).
4. A device as claimed in claim 1, characterised in that said rotation-enabled element (2) comprises a cylindrical outer surface (31); said filtering surface (1) being of overall cylindrical shape and disposed adhering to said outer surface (31); said through bores (5) having a substantially radial direction.
5. A device as claimed in one or more of the preceding claims, characterised in that said rotation-enabled element (2) is linked to drive means provided with controls for operation by an operator.
6. A device as claimed in claims 1 and 2, characterised in that said rotation-enabled element (2) is linked to drive means controlled for automatic operation.
7. A device as claimed in one or more of the preceding claims, characterised in that the casing (30) comprises two flanges (12 and 13) which are connected together by an outer wall (18) defining a space portion about the filtering surface (1), are provided with supports (33) and (34) for the element (2), and are assembled by tie bolts (16), one flange (12) being provided with the inlet port (12a) for the fluid to be filtered and the outlet port (12b) for the filtered fluid, and the other flange (13) being provided with the discharge hole (13a) for the material retained by the filtering surface (1).
8. A device as claimed in one or more of the preceding claims, characterised by comprising axially extending blades (11) disposed about the filtering surface and connected to the lower end of the rotation-enabled element (2).
9. A device as claimed in one or more of the preceding claims, characterised in that said filtering surface (1) is kept adhering to the rotation-enabled element (2) by rings (7), (8) pressed by ring nuts (10) mounted on said element (2).
EP87201069A 1986-06-24 1987-06-09 Fluid filtration device Expired - Lifetime EP0251368B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87201069T ATE67011T1 (en) 1986-06-24 1987-06-09 FLUID FILTERING DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1810786 1986-06-24
IT18107/86A IT1189782B (en) 1986-06-24 1986-06-24 DEVICE FOR FILTRATION OF FLUIDS

Publications (3)

Publication Number Publication Date
EP0251368A2 true EP0251368A2 (en) 1988-01-07
EP0251368A3 EP0251368A3 (en) 1989-10-11
EP0251368B1 EP0251368B1 (en) 1991-09-04

Family

ID=11151873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87201069A Expired - Lifetime EP0251368B1 (en) 1986-06-24 1987-06-09 Fluid filtration device

Country Status (5)

Country Link
EP (1) EP0251368B1 (en)
JP (1) JPH06104169B2 (en)
AT (1) ATE67011T1 (en)
DE (1) DE3772644D1 (en)
IT (1) IT1189782B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990000435A1 (en) * 1988-07-14 1990-01-25 Tage Christoffer Hansen Method of cleaning particles from a filter and a filter for use hereby

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8647516B2 (en) 2010-09-03 2014-02-11 Johnny Leon LOVE Filtration method with self-cleaning filter assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245541A (en) * 1963-02-04 1966-04-12 Pall Corp Filter for use under icing conditions
US4204961A (en) * 1978-03-15 1980-05-27 Cusato John Jr Filter apparatus with cleaning function
US4624779A (en) * 1985-09-10 1986-11-25 Hurner Erwin E Fuel treatment apparatus
DE3538282A1 (en) * 1985-10-28 1987-04-30 Hengst Walter Gmbh & Co Kg Diesel fuel filter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4813874U (en) * 1971-06-23 1973-02-16
JPS51137165U (en) * 1975-04-26 1976-11-05

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245541A (en) * 1963-02-04 1966-04-12 Pall Corp Filter for use under icing conditions
US4204961A (en) * 1978-03-15 1980-05-27 Cusato John Jr Filter apparatus with cleaning function
US4624779A (en) * 1985-09-10 1986-11-25 Hurner Erwin E Fuel treatment apparatus
DE3538282A1 (en) * 1985-10-28 1987-04-30 Hengst Walter Gmbh & Co Kg Diesel fuel filter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990000435A1 (en) * 1988-07-14 1990-01-25 Tage Christoffer Hansen Method of cleaning particles from a filter and a filter for use hereby

Also Published As

Publication number Publication date
IT8618107A0 (en) 1986-06-24
JPH06104169B2 (en) 1994-12-21
DE3772644D1 (en) 1991-10-10
EP0251368B1 (en) 1991-09-04
ATE67011T1 (en) 1991-09-15
JPS6328414A (en) 1988-02-06
IT8618107A1 (en) 1987-12-24
EP0251368A3 (en) 1989-10-11
IT1189782B (en) 1988-02-04

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